asp.net - 如何使用Tempdata显示列表

Question

我已经在 dotnet core 中上传了 excel。我不得不使用 tempdata 来检索列表中 excel 的详细信息。相反，在我下面的代码中，我使用了静态对象来检索列表。我的代码是这样工作的，当我点击时在上传按钮上，它会在 Excel 表格中显示详细信息。当点击保存时，它会将其保存到数据库中，我还需要使用 ajax 调用在网格 View 中进行编辑。帮我解决

我在 Controller 中的操作是

public async Task<IActionResult> ImportEmployeeDetails(IFormFile excelfile)
{
        try
        {
            EmployeesViewModelList employeesListObject = new EmployeesViewModelList();
            List<EmployeeModel> employeesViewModelList = new List<EmployeeModel>();
            if (excelfile == null || excelfile.Length == 0)
            {
                return View(employeesListObject);
            }
            var supportedTypes = new[] { ".xls", ".xlsx" };
            var ext = Path.GetExtension(excelfile.FileName);
            if (!supportedTypes.Contains(ext))
            {
                return View(employeesListObject);
            }
            var path = Path.Combine(
                       Directory.GetCurrentDirectory(), "wwwroot",
                       "EmployeeDetails.xlsx");

            if (System.IO.File.Exists(path))
            {
                System.IO.File.Delete(path);
            }

            using (var stream = new FileStream(path, FileMode.Create))
            {
                await excelfile.CopyToAsync(stream);
            }
            FileInfo file = new FileInfo(path);
            using (ExcelPackage package = new ExcelPackage(file))
            {
                ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
                int rowCount = worksheet.Dimension.Rows;
                int ColCount = worksheet.Dimension.Columns;

                for (int i = 2; i <= rowCount; i++)
                {
                    EmployeeModel emp = new EmployeeModel();
                    emp.EmployeeId = Convert.ToInt32(worksheet.Cells[i, 1].Value.ToString());

                    emp.EmpFirstName = worksheet.Cells[i, 2].Value.ToString();
                    employeesViewModelList.Add(emp);

                }

                employeesListObject.EmpModelList = employeesViewModelList;
                return View(employeesListObject);

            }
        }
        catch(Exception ex)
        {
            TempData["Message"] = "Opps! Something Went wrong!";
            return RedirectToAction("ExcelPackage");
        }
}

Answer 1

试试这个，使用你自己的列表。

List<string> SomeList = new List<string>();

TempData["MyList"] = SomeList;

//then to get data just do 

SomeList = TempData["MyList"] as List<string>; //This converts back to List<T>

将列表添加到 TempData 后，您可以从同一 Controller 中的任何操作或 View 中检索它